A Windows Server CAL is a license that grants access Windows Server. CALs are used in conjunction with Microsoft Windows Server OS licenses to allow Users and/or Devices to access and utilize the services of that windows server
- User CALs allow a single user access to Windows Server from an unlimited number of devices
- Device CALs allow an unlimited number of users to access Windows Server from a single device
not to be confused with RDS Cals.
https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-client-access-license
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